Looks like they removed the "upload" button: http://labs.echonest.com/Uploader/faq.html http://labs.echonest.com/Uploader/faq.html And it doesn't appear to be

Looks like they removed the "upload" button: http://labs.echonest.com/Uploader/faq.html http://labs.echonest.com/Uploader/faq.html And it doesn't appear to be open source, sadly.